No, it is a sentence. There is no preposition among those four words.
grocer
sells food
Could be Grocer, a dealer in foodstuffs and household supplies
A butcher
A grocer, or greengrocer.
a green grocer
A person who sells food and small household goods
a grocer is one who buys goods in bulk and then sells them.so we can buy almost all daily need products ranging from tea,coffee to dals,spices.
UK : Greengrocer - US : Grocer
grocer or purveyorA greengrocer or fruiterer.
Starbucks sells the most coffee. They are the largest coffee company in the world.
obviously.it sells coffee